有关u-turn

小胡同

最近查google map for directions, 经常会看到需要u-turn。印象之中好像在主路上不可以，不管是否有不可u-turn的牌子。平常也看到有人在红绿灯处做u-turn。
* e; d3 u9 a/ i8 n1 ~9 U# C! w8 S; X请问u-turn到底是不是合法的？
  G  W$ S/ @0 d) B2 s7 q" o! ]谢谢！

EightBelow

U-turns
• Do not make a U-turn unless you can do it safely and without interfering
) s* m/ N/ v* `6 F# j* |with other traffic.
6 C" M3 p' I# X+ s5 A3 M• Outside urban areas U-turns are not permitted on a curve or near the
) o3 Z; Y3 u! s3 \6 a9 {+ Icrest of a hill where the driver of another vehicle cannot see your vehicle.
2 Y/ c! X* a# A( z. }U-turns are not permitted in urban areas in the following situations:
• On a roadway between intersections.
• Where a sign prohibits making a U-turn.
• At an intersection controlled by a traffic-control signal (traffic lights).
• At an alley intersection.

无语

有红绿灯的地方U-Turn是违规的。